Metal-punch



(No Model.)

G. MCDONALD.

METAL PUNCH. No. 310,142. Patented Dec. 30, 1884.

INVENTOR m idw BY ATTORNEYS.

UNITED STATES PATENT OFFICE.

GILBERT MCDONALD, OF AUGUSTA, KANSAS, ASSIGNOR TO HARTFORD M. MEREDITH, OF SILVER CITY, AND JAMES A. LUCAS, OF GEORGETOWN,

TERRITORY OF NElV MEXICO.

M ETAL-PUNCH.

SPECIFICATION forming part of Letters Patent No. 310,14c2, dated December 30, 1884.

Application filed May 20, 1884. (No model.)

To (ZZZ whom it may (EON/(38772,:

Be it known that I, GILBERT IlICDONALD, of Augusta, in the county of Butler and State of Kansas, have invented a new and Improved Metal-Punch, of which the following is a full,

clear, and exact description.

This invention relates to an in'iprovement upon my compound metal-working machine shown and described in Letters Patent No.

288,827, which were granted to me November 20, 1883; and the present invention consists of the employment of a segmental ratchet arranged to be operated by a pawl and lever for forcing downward the cutting or punching t 5 tool.

Reference is to be had to the accompanying drawing, forming part of this specification, in which the figure is a side elevation of my new and improved metalworking tool.

A represents the standard, formed with the base a, in or upon which the die-bl0ek Z) is held. The thrust-bar c, in which the tool (Z is held moves in a way formed by the capplate 6, secured to the side of the stand- 2 5 ard A, so as to hold the thrust bar 0 immediately over the die block b. The upper end of the thrustbar cis connected by the linkf to the stud g, formed upon the shank h of the segmental ratchet B, which is pivoted 0 to the standard A upon the pivot t, which stands slightly out of center with the stud so that when the segmental ratchet B is rocked upon its pivot i the stud g will have an eccentric action for raising and lowering the thrustbar c,in substantially the same manner as described in the patent above referred to. Just above the curved toothed portion h of the segmental ratchet B is pivoted upon the stud j the hand-lever O, and to the lever is pivoted upon the stud 7c the pawl Z, arranged to engage with the teeth of the segmental ratchet B, so that by reciprocating the hand-lever O the pawl Z will work forward the segmental ratchet B with great force, and cause the stud g and link f to force the thrust-bar c and tool d downward with great force, causing the tool d to cut or punch the work placed upon the the block I). The pawl Z is held in contact with the teeth of the segmental ratchet B by the action of the spring in, attached to the hand-lever and arranged to press against the notch 12, made in the upper side of the pawl. 0 is a stop-pawl for holding the segmental ratchet B from backward movement. This pawl 0 is pivoted upon the stud P, formed upon the extension A of the standard A, and is held in contact with the teeth of the ratchet B by the spring q, attached to the standard A and arranged to act against the notch a", made in the heel of the pawl o, as shown clearly in the drawing.

Constructed in the manner described,with a small outlay of power at the hand-lever O,the segmental rack .13 will be forced forward with a slow movement and the thrust-bar a downward with a force sufficient to cut or punch bars or plates of iron or steel.

Instead of using the pawl-lever C for operating the segmental ratchet B,the teeth of the ratchet might be made like cogs, and a pinion and crank-wheel employed for operating it,and not depart from the spirit of my inventron.

Having thus fully described my invention, I claim as new and desire to secure by Letters 1; atent 1. In a metal-punch, the segmental ratchet B, connected to the thrust-bar c and combined with apawl'lever or similar means for operating it, substantially as set forth.

2. The pivoted segmental ratchet B, connected to the thrust-bar c by the pin or stud g and link f, in combination with the lever O, pawl Z, and stop-pawl 0, arranged to operate substantially as and for the purposes setforth. 85

GILBERT MCDONALD.

lVitnesses:

WALTER GOOD, I. A. Rnoanns. 

